Tunnel boring machine - Wikipedia

A tunnel boring machine (TBM), also known as a "mole", is a machine used to excavate tunnels with a circular cross section through a variety of soil and rock strata.They may also be used for microtunneling.

Alpine Rock & Concrete Grinders | Soil Mixers | Roadheaders ...

Alpine specializes in rock & concrete cutting attachments, roadheaders, and soil mixing equipment. For over 40 years we have provided innovative,cost-effective solutions for the construction, mining, and environmental remediation sectors.

impact roadheader of gypsum - hbindustries.in

Roadheaders (Dosco twin boom) with the experience and background from undergroundSelective mining of thin horizontal gypsum layers with different qualitiesEliminates the hazards of blasting and environmental impact arising out of it.